Efficient removal of Cr from aqueous solution by catechol/m-phenylenediamine nanospheres combined with Fe(II).

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-01-01 DOI:10.1080/10934529.2023.2241315

Mina Luo, Chunmei Zhu, Changcheng Chen, Fu Chen, Yuanqiang Zhu, Xuemei Wei

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Abstract

The discharge of chromium-containing wastewater in industrial production causes resource loss and damage to the ecological environment. Currently, various phenolamine materials have been used to remove chromium, but their harsh adsorption conditions bring many difficulties. For example, ideal chromium removal is only achieved at low pH. In this study, we synthesized catechol/m-phenylenediamine nanospheres (CMN) and combined CMN with Fe(II) for Cr removal from aqueous solutions, and Fe(II) comes from FeSO₄·7H₂O. CMN was characterized and analyzed by field-emission scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), Fourier transformed infrared (FTIR), X-ray diffraction (XRD), X-ray photoelectron (XPS). The adsorption performance was studied through a series of adsorption experiments. When C₀ = 900 mg/L and pH = 6, the maximum adsorption capacity obtained in the experiment was 977.1 mg/g. It maintains excellent adsorption properties in acidic, neutral and alkaline environments. The results of the adsorption mechanism showed that the ultra-high adsorption capacity of CMN and Fe(II) for Cr was the result of the synergistic effect of adsorption and reduction, including electrostatic attraction, reduction and coprecipitation. CMN is expected to be an ideal adsorbent for Cr removal in aqueous solution due to its low cost, high biocompatibility and high efficiency in Cr removal.

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儿茶酚/间苯二胺纳米球与Fe(II)复合对水中铬的高效去除

工业生产中含铬废水的排放造成资源的损失和生态环境的破坏。目前，已有多种酚胺类材料用于除铬，但其吸附条件恶劣，带来诸多困难。例如，只有在低ph下才能达到理想的除铬效果。在本研究中，我们合成了儿茶酚/间苯二胺纳米球(CMN)，并将CMN与Fe(II)结合，以去除水溶液中的Cr, Fe(II)来自FeSO4·7H2O。采用场发射扫描电镜- x射线能谱(SEM-EDS)、透射电镜(TEM)、傅里叶变换红外(FTIR)、x射线衍射(XRD)、x射线光电子(XPS)对CMN进行了表征和分析。通过一系列吸附实验研究了其吸附性能。当C0 = 900 mg/L, pH = 6时，实验获得的最大吸附量为977.1 mg/g。在酸性、中性和碱性环境中保持优异的吸附性能。吸附机理研究结果表明，CMN和Fe(II)对Cr的超高吸附能力是吸附和还原协同作用的结果，包括静电吸引、还原和共沉淀。CMN具有成本低、生物相容性好、除铬效率高等优点，有望成为一种理想的水中除铬吸附剂。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.